Optimization Of Horizontal Well Perforation Density

With the development of horizontal well technology, the number of horizontal wells is also significantly increasing, and the research work of horizontal perforated completion has also been increasing attention. As the perforated completion can be more effective containment and support the production layer of loose easily collapse, separate different pressure and different characteristics reservoir, and thus become the main way of horizontal well completion. But in the process of horizontal perforated completion, there are some problems such as perforation cost, easy to lead to bottom water or edge water coning, and so on. Therefore, only guaranteed shot perforating potential, pierced can not meet the production needs , we must do to protect reservoir, to avoid any possible phenomenon of obstructing oil and gas from the formation into well, to ensure greater oil and gas well production capacity as much as possible. Reduce the cost of perforation, to prevent the bottom water and edge water corning ,to improve the flow profile of the perforated horizontal wells ,to improve production capacity of perforated horizontal wells are objectives of the study. By establishing reservoir fluid seepage model, perforating flow model, wellbore fluid flow pressure model and reservoir-wellbore flow coupling model, establish the model of variable density perforation optimization ,through the model optimize the inflow profile of perforated completion horizontal well. Based on the above theoretical model, a computer software which optimize horizontal well perforated completion is developed using VisualBasic6.0.The result show that : in the process of Horizontal perforated completion , by optimizing perforation density can improve production profile, maximum capacity, guarantee wellbore fluid inflow profile uniform, prevent effectively bottom water coning, save perforation cost, may further increase the horizontal well productivity and keep relatively long-term production stable and high. The study provides a theoretical basis and optimization tools for horizontal well perforated completion, offering an important guideline to the improvement of horizontal well developed result.